Hardened H21 Tool Steel
Tool Steels
Property Overview
Density8.5g/cm³
Elastic Modulus200GPa
Tensile Strength1790MPa
Yield StrengthUnknown
Brinell HardnessUnknown
Maximum Service TemperatureUnknown
Chemical Composition
C
0.28 to 0.36%
CR
3.0 to 3.8%
NI
0 to 0.3%
MN
0.15 to 0.4%
SI
0.15 to 0.5%
P
0 to 0.030%
S
0 to 0.030%
CU
0 to 0.25%
V
0.3 to 0.6%
W
8.5 to 10%
FE
87.6 to 93.8%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Poisson's Ratio
0.29
Shear Modulus
76 GPa
Tensile Strength: Ultimate (UTS)
1790 MPa
Hardness
Rockwell C Hardness
55
Physical
Density
8.5 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Melting Completion (Liquidus)
1630 °C
Melting Onset (Solidus)
1580 °C
Specific Heat Capacity
440 J/kg-K
Thermal Conductivity
27 W/m-K
Thermal Diffusivity
7.1 mm 2 /s
Thermal Expansion
11 µm/m-K
Thermal Shock Resistance
59 points
Calculated
PREN (Pitting Resistance)
19
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
23 points
Strength to Weight: Axial
58 points
Strength to Weight: Bending
38 points
Environmental
Base Metal Price
23 % relative
Embodied Carbon
4.5 kg CO 2 /kg material
Embodied Energy
68 MJ/kg
Embodied Energy
68 MJ/kg 29 x 10 3 BTU/lb
Embodied Water
72 L/kg
Embodied Water
72 L/kg 8.6 gal/lb
Registered Designations & Aliases
Hardened H21 Tool Steel
Standards
ASTM A681 ASTM A681: Standard Specification for Tool Steels Alloy
SAE J437 SAE J437: Selection and Heat Treatment of Tool and Die Steels
SAE J437 SAE J437: Selection and Heat Treatment of Tool and Die Steels ASTM A681: Standard Specification for Tool Steels Alloy Tool Steels: Properties and Performance, Rafael A. Mesquita (editor), 2016